dart-lang/www.dartlang.org — pull request #1141 by Scorpiion (2014-11-12 01:02:57+00:00)
Title: Make definition of allowed characters more precise

The current description could be more precise, "Stick with" can be read as a suggestion rather than a strict rule. It can lead to confusion such as the misunderstanding in this issue:
https://code.google.com/p/dart/issues/detail?id=21576